Critical severity · published Oct 6, 2026
CVE-2026-77178
Oracle VM VirtualBox before 7.2.8 allows guest OS users to cause an out-of-bounds write in the host OS in pcnetReceiveNoSync in DevPCNet.cpp in the PCNet (Am79C970A) network…
9.1
CVSS
0.3%
EPSS
No
On KEV
Description
Oracle VM VirtualBox before 7.2.8 allows guest OS users to cause an out-of-bounds write in the host OS in pcnetReceiveNoSync in DevPCNet.cpp in the PCNet (Am79C970A) network device model.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-77178
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-77178
www.oracle.com
https://www.oracle.com/
www.virtualbox.org
https://www.virtualbox.org/wiki/Download_Old_Builds_7_0
gist.github.com
https://gist.github.com/entropy1337/cd0d5b368445d20c43aca2590b313892